Ship construction.



T. R. GAWLEY.

SHIP CONSTRUCTION.

APPLICATION FILED FEB. 20, 1913.

1,093,692. Patented Apr. 21, 1914;

WITNESSES v INVENTOR 771?. Gay/lay J Allwm q,

COLUMBIA PLANOGRAPH 60.. WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

THOMAS R. GAWLEY, OF BELLINGHAM, WASHINGTON.

SHIP CONSTRUCTION.

Specification of Letters Patent. Application filed February 20, 1913.

chambers, air being drawn through the vertlcally extendlng pipes 12,passing under the stern of the vessel and 1,093,692. Patented Apr. 21,1914:.

Serial No. 749,702.

To all whom it may concern:

Be it known that I, THOMAS R. GAWLEY, citizen of the United States,residing at of Whatcom and have invented certain new and usefulImprovements in Ship Uonstructions, of which the following is aspecification.

This invention relates in ship constructions.

The primary object of the invention is to provide means for creating avacuum at certain points in the wake of a ship or barge which may beutilized to decrease suction, allowing it to move faster with the sameamount of power and at the same time preventing the ship from squatting.

A further object of the invention is to provide a construction in whichthe vacuum created at the stern of the ship may be utilized to drawwater from the hold of the ship.

A still further object of the invention is to provide a constructionwhich may be embodied in ships and barges now in use without alteringtheir construction or in any way affecting the operation of thepropelling mechanism.

In the drawings: Figure l is a side elevation showing a portion of astern of a vessel equipped with the apparatus; Fig. 2 is a rearelevation; Fig. 3 is a longitudinal sectional view showing a bargeequipped with vacuum creating means; Fig. 4 is a longitudinal sectionalview showing the barge equipped with vacuum creating means and aconstruction whereby the vacuum creating means may be utilized to drawwater from the hold of the vessel; Fig. 5 is an end elevation of thebarge showing the vacuum chambers.

In the drawing 10 designates the hull of a vessel which is of the usualconstruction. The hull at a point slightly above the rudder and belowthe water-line is provided with a series of chambers 11, of a numberconsistent with the beam of the vessel, the chambers comprisingrectangular metallic casings. A vertically extending pipe 152 isconnected to each of the chambers, said pipe being open and extendingthrough the hull above the water-line. The chambers 1.1 are preferablydisposed in parallel planes with the heel of the vessel, it being notedthat as the vessel is drawn through the water a partial vacuum will becreated. in the squatting and allowing the boat to move forward at agreater rate of speed with the same amount of power.

While the vacuum chambers are shown as rectangular in cross section, itwill be noted that they may be made of a configuration to conform to thesheer of the vessels stern, the chambers being so located below thewater-line that they will not interfere with the propeller.

It will thus be noted that the device thus far described provides aneffective mechanism for preventing suction in the wake of the ship, theconstruction being such as may be applied to vessels and barges withoutaltering their construction or in any way endangering the safety of thevessel.

5, the apparatus is shown as applied to barges, and in Fig. 4: thevertically extending pipes 13 are provided adjacent their connectionswith the chambers 14: and with the pipes 15 which are disposed at anangle to the vertically extendmg to an improvement the hold of thevessel the valve 17 is closed and the valve 18 is opened. Thus it wil beseen that instead of air being drawn passing out through the chamber 14.

he many advantages of a construction of this character will be clearlyapparent, as it will be noted that water may be removed from the hold ofthe vessel without the use of air pumps and without stopping the vesanair pipe extending vertically from at small expense, the apparatusperforming the double function of assisting the vessel in its movementthrough the water and removing water from its hold.

Having thus described the invention, what I claim is:

An apparatus comprising a the stern of of the character described seriesof chambers located at a vessel below the water-line, said chambersabove the water-line, the upper terminals of said pipe being open, avalve arranged in said pipe, and a fluid receiv- Gopies of this patentmay be obtained for five cents each,

ing pipe connected to the air pipe and disposed at an angle thereto, avalve arranged in said fluid receiving pipe, a vacuum being created inthe chamber by the forward movement of the vesse the suction beingalternately directed through either of the pipes which are connected tosaid chamber.

In testimony whereof I afiix my signature in presence of two witnesses.

THOMAS H. GACWLEY. [Ls] \Vitnesses:

J. B. ABRAMs, Loom C. ABRAMS.

by addressing the Commissioner of .Eatents,

Washington, D. G.

